RJX - HOBBYKING, please take note that the kit is beins sold with the new tail box, which is especially made for the Vectron 520 which uses carbon tail tube INNER DIA 20 mms, but in the kit it comes the alu tube whick is 21 mms inner dia. so the tail box does not fix the tube, and it seems that RJX have not observed-noticed this mistake, which could be solved with a ring with inner dia 20 mms and outer dia. 21 mms, and for future buyers take also note that the tail beltcrack is left handed although in pics it shows right handed.
nevertheless, these are minor mistakes that can be easily solve with a little efford from RJX, BUT in general the KIT is FABULOUS FANTASTIC, i believe is the best, logical and rational design ever assembled.
Dont dude, if you want a heli, and you are experienced chopper, BUY IT you will not ever regret.
Despite the minor mistakes , I HAVE TO GIVE A FIVE STARS plus for design, quality and PRICE.